This is how to chroma key (“green screen”), using the Blackmagic Design ATEM Mini Pro. Although the ATEM Mini Pro at the time of posting this can only house still images for green screen backdrops, this tutorial explains how to use full-motion video green screen backdrops for ATEM Mini Pro. Since the ATEM Mini Pro doesn’t house video clips like it does still images, the secret is to use one of the four HDMI inputs on the ATEM Mini Pro as the video source. Within this video, I explain how insert a custom video green screen backdrop for the ATEM Mini Pro. #ATEMMiniPro